Problem with NIOS II

[Altera_Forum]

I am new to NIOS II. I have been trying to get familiar with UP3 development board, Quartus 4.5 and NIOS II.  

 I have created a simple hardware consisting of NIOS II CPU, JTAG UART, Timer, UP3_SRAM and Avalon Tri-State Bridge.  I have been able to compile it without any errors.  I then tried executing "Hello_World" program after programming the kit with the above hardware design.  After running the program, I didnt get any output on my console. The expected output was that the string "Hello from NIOS II!" should be printed on my console.  I then debugged the program. Before debugging, I checked the option "break at alt_main()" and unchecked the option "break at main()". When I started debugging I got the following error:   The execution of program is suspended because of error.  Warning:  Cannot insert breakpoint 1.  Error accessing memory address 0x97d4: (undocumented errno -1).   I have tried with another program where I am trying to print 3 strings. I am getting the same error. In this case, after I start debugging, I am able to step debug till the last statement in alt_main() which is  exit (main (alt_argc, alt_argv, alt_envp));  When I step into this instruction, the control instead of passing to main() passes _malloc_lock() in alt_malloc_lock.c. This is an empty function and on stepping over this function I get the above error again:  The execution of program is suspended because of error.  Warning:  Cannot insert breakpoint 1.  Error accessing memory address 0x97d4: (undocumented errno -1).  I have been trying to figure out this problem since last few days but havent been able to do so. As a last resort I am posting to the group. Kindly respond promptly with suggestions.  Thanks in advance.  Regards Prashant Agrawal

[Altera_Forum]

The designs that I've done with the UP3-1C6 and UP3-1C12 all started with one of the UP3 example designs at sls corp's up3 documents page (http://www.slscorp.com/up3support/pages/documents.php). 

 I modified the example design to do what I wanted.  So far, my favorite example is reference design for accessing memory at the bottom of the page, since it has all of the board's memories available in the design.  Have you been able to use one of the UP3 example designs, unchanged?  Kerry